ESTIMATION OF HETEROSIS FOR YIELD TRAITS IN F1AND F2 GENERATION OF IN WINTER WHEAT X SPRING WHEAT CROSS COMBINATIONS (TRITICUM AESTIVUM L.) UNDER RAINFED CONDITIONS

A.A. SHAH¹, A. KUMAR²*, A. KOUR³, S.K. MONDAL^4
1Department of Plant Breeding and Genetics, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Shalimar, Srinagar, 190025, India
²Department of Plant Breeding and Genetics, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Shalimar, Srinagar, 190025, India
³Department of Plant Breeding and Genetics, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Shalimar, Srinagar, 190025, India
⁴Department of Plant Breeding and Genetics, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Shalimar, Srinagar, 190025, India
* Corresponding Author : ashwani9961kumar@gmail.com

Received : 06-05-2020     Accepted : 28-05-2020     Published : 30-05-2020
Volume : 12     Issue : 5       Pages : 735 - 739
Genetics 12.5 (2020):735-739

Keywords : Winter Wheat, Spring Wheat, Line x Tester, Heterosis
Academic Editor : Dr Nimit Kumar
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Plant Breeding and Genetics, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Shalimar, Srinagar, 190025, Jammu and Kashmir, India
Author Contribution : All authors equally contributed

The present investigation was carried out at the research farm of the Division of Plant Breeding & Genetics, SKUAST, Jammu, Chatha, from Rabi 2104-15 to 2016-17. The experimental material of the present study comprised 20 true breeding facultative type winter wheat lines which were evaluated under rainfed conditions in a Randomized block design. The best ten winter wheat genotypes (Arkaan, Blue boy, China 4435893, Drina, DrinaNS 720, Nordersprez, WW12, WW21, WW23 and WW25) used as line and three spring wheat genotypes (PBW175, PBW 644 and WH 1080) were used as tester to develop the experimental material for line x tester mating design. In Rabi 2016-17, 30 F1s and advanced 30 F2 seeds along with parents were sown in a randomized block design under rainfed conditions. Observations were recorded on yield traits. Heterotic pattern estimation revealed that none of the cross combination had significant heterosis for all the traits. However, on individual trait basis, some of the crosses revealed significant heterosis. The crosses showing desirable heterosis (10 % or above that) were Nordersprez x PBW 175, WW21 x PBW 175, Drina x PBW 175, WW12 x PBW 175, WW25 x PBW 175 and Drina NS 720 x PBW 175, in F1 and F2 generation of crosses. Significant desirable heterosis for many traits revealed the possibility of yield improvement through heterosis breeding.

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